Gurobi 5.0.1 (linux64) logging started Sat Nov 17 01:20:45 2012 Optimize a model with 50031 rows, 45156 columns and 194190 nonzeros Presolve removed 1274 rows and 2 columns Presolve time: 1.25s Presolved: 48969 rows, 45154 columns, 235494 nonzeros Variable types: 0 continuous, 45154 integer (45154 binary) Found heuristic solution: objective 212.0000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 30229 3.0000797e+00 6.961089e+00 0.000000e+00 5s 36163 3.0000822e+00 3.390000e+01 0.000000e+00 10s 36578 3.0000000e+00 0.000000e+00 0.000000e+00 10s Root relaxation: objective 3.000000e+00, 36578 iterations, 10.24 seconds Total elapsed time = 28.15s Total elapsed time = 30.26s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 50 212.00000 3.00000 98.6% - 30s H 0 0 3.0000000 3.00000 0.0% - 30s Explored 0 nodes (91826 simplex iterations) in 30.49 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+00, best bound 3.000000000000e+00, gap 0.0%